Friction engaging device

Patent metadata

Field	Value
Publication number	US-11168745-B2
Application number	US-202016809992-A
Country	US
Kind code	B2
Filing date	Mar 5, 2020
Priority date	May 28, 2019
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

The present disclosure provides a wet friction engaging device. The device includes: a plate group engaged with two connecting members and including two groups of friction plates housed in a plate housing chamber and alternately arranged in an axial direction with surfaces facing each other; and a piston configured to apply a pressing force to the plate group. The plate group is switched between an engaged state in which the friction plates are in close contact with each other, and a disengaged state in which the friction plates are separable from each other. One of end plates at respective ends of the plate group is a movable end plate movable in the axial direction, and the other is a stationary end plate immovable in the axial direction. The movable end plate is biased by a spring.

First claim

The invention claimed is:

1. A wet friction engaging device for switching transmission of power to be output to a rotary shaft, the device comprising:
two connecting members, each having a surface facing a surface of the other connecting member in a radial direction with a plate housing chamber interposed therebetween, the chamber being supplied with lubricating oil;
a plate group engaged with the connecting members and including two groups of friction plates housed in the plate housing chamber and alternately arranged in an axial direction with surfaces facing each other; and
a piston moving between an input side and an output side in the axial direction toward the plate group to apply a pressing force to the plate group, wherein
the plate group is switched between an engaged state in which the friction plates are in close contact with each other upon application of the pressing force and a disengaged state in which the friction plates are separable from each other upon release of the pressing force,
one of end plates at respective ends of the plate group is a movable end plate movable in the axial direction, and the other is a stationary end plate immovable in the axial direction,
the movable end plate is biased by a biasing member to be separated from the stationary end plate in the axial direction,
the movable end plate is the end plate on a side closer to the piston,
the stationary end plate is positioned by stacking a regulator plate on and outside the end plate on a side away from the piston and having a first movement regulator at one side of these plates and a second movement regulator at the other side to restrict axial movement, and
the biasing member is a spring, which is attached between the movable end plate and the regulator plate.

2. The friction engaging device of claim 1 , wherein
at least one end of the spring is fixed to one of the end plates.

3. The friction engaging device of claim 2 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

4. The friction engaging device of claim 3 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

5. The friction engaging device of claim 1 , wherein
at least one end of the spring is detachably supported by a spring holder located at one of the end plates.

6. The friction engaging device of claim 5 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

7. The friction engaging device of claim 6 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

8. The friction engaging device of claim 1 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

9. The friction engaging device of claim 8 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

Assignees

• Mazda Motor

Inventors

• Sori Tsukasa
• Ebisumoto Hirofumi

Classifications

• F16H2063/3093

  Final output elements, i.e. the final elements to establish gear ratio, e.g. coupling sleeves or other means establishing coupling to shaft · CPC title

• F16D13/68

  Attachments of plates or lamellae to their supports {(one or more discs connected to the linings transmitting torque to one or more discs connected to the hub by helical springs in windows in the discs, i.e. rotary vibration dampers F16F15/12)} · CPC title

• F16D13/52

  Clutches with multiple lamellae {; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member (F16D13/385 takes precedence)} · CPC title

• F16D25/0638 Primary

  with more than two discs, e.g. multiple lamellae · CPC title

• F16D13/69

  Arrangements for spreading lamellae in the released state · CPC title